Coordination Compounds - Result Question 53

####60. Which of the following complex ion is not expected to absorb visible light ?

[2010]

(a) [Ni(CN)4]2−

(b) [Cr(NH3)6]3+

(c) [Fe(H2O)6]2+

(d) [Ni(H2O)6]2+

Show Answer

Solution:

(a) [Ni(CN)4]2−: Number ofunpaired electrons =0

[Cr(NH3)6]3+: Number of unpaired electrons =3

[Fe(H2O)6]2+: Number of unpaired electrons =4

[Ni(H2O)6]2+: Number of unpaired electrons =2

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